JP2000248611A - Water supply device used for reversal sealing method and non excavation resin lining method for existing piping - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce labor and repair costs in a case where a reversal sealing method and a non excavation resin lining method are implemented in the same pipe retreatment and repair site. SOLUTION: The water supply device is comprised of a feed water pump, a heating member, an electromagnetic valve connected to the outlet of the feed water pump, a water meter M that measures the quantity of water supplied to the feed water pump, and a control unit that opens and closes the electromagnetic valve. In a reversal sealing method, a warm water tank T1 is connected to the water intake of the feed water pump, piping 1 is connected to the outlet, thereby conducting warm water heated with a heater and a heat exchanger to the piping 1. In a non excavation resin lining method, a water tank is connected to the water intake of the feed water pump, one end of the piping is connected to the outlet, and the control unit, on the basis of a measurement of the water meter M, closes the electromagnetic valve when the quantity of water from the feed water pump reaches a prescribed level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply apparatus used in a reversal sealing method for rehabilitating an existing pipe and a non-digging resin lining method.

[0002]

One of the techniques for rehabilitating existing pipes, such as gas pipes and water pipes, while laying them, is known as a reversal seal method (reversal lining method). , Non-drilling resin lining method (NE
XT method).

[0003] The reversal sealing method is a flexible lining which has an outer diameter substantially equal to the inner diameter of a pipe and has an adhesive sealed inside from an end of an existing pipe buried underground or the like. The tube is inserted into the pipe while being turned upside down such that the inner surface is on the outside, and is attached to the inner surface of the pipe with an adhesive. Then, in this reversal sealing method, as shown in FIG. 3, after the lining tube 2 is inserted into the pipe 1, hot water is applied so that the lining tube 2 is securely adhered to the inner surface of the pipe 1. Tank T1
Is circulated into the pipe 1 by the circulating device 3 to bring the lined tube 2 into close contact with the pipe 1 and to cure the adhesive. In FIG. 3, T2
Is a cold water tank for cooling the pipe 1 after circulation of hot water.

On the other hand, in the non-digging resin lining method, as shown in FIG. 3, a lining pig 11, a lining resin A, a conveying pig 12, a water absorbing agent B, and a water shielding pig 13 are sequentially arranged from the opening end side of the pipe 10. Then, the lining resin A is fed to the target position of the pipe 10 by the water pressure supplied from the water supply tank T3 by the water supply pump 14. After that, the lining resin A is pulled back by the suction pump, and a uniform lining film of the lining resin A is formed on the inner surface of the pipe 10 by the lining pig 11.

[0005] The above-mentioned reversal seal method is one of the most effective rehabilitation repair methods for the aging of existing pipes.
Since it cannot be implemented when both ends of the pipe cannot be opened or when the pipe is branched in the repair section, the non-digging resin lining method is effective for such a repair section. Become. For this reason, conventionally, as shown in the figure, of the branch pipes branching from the main pipe P, the section at which both ends can be opened is formed by the reversal seal method, and the section from the end of the repair section by the reversal seal method to the main pipe P is formed. Sections are rehabilitated and repaired by a non-excavated resin lining method.

However, in the case where the non-digging resin lining method is carried out in a section following the rehabilitation repair section of the pipe by the reverse sealing method as described above, the non-digging resin lining method is used in addition to the equipment for the reverse sealing method. It is necessary to transport the equipment for the construction method to the rehabilitation repair site, and another work vehicle is required. For example, there are problems such as an increase in labor and an increase in repair cost.

The present invention has been made to solve the problem in the case where the above-described reversal sealing method and the non-digging resin lining method are performed at the same pipe rehabilitation repair site. That is, an object of the present invention is to reduce labor and repair cost when the reversal sealing method and the non-digging resin lining method are performed at the same pipe rehabilitation repair site.

[0008]

According to the present invention, there is provided a water supply apparatus used in an existing pipe reversal sealing method and a non-drilling resin lining method according to the present invention, in order to achieve the above object, a water supply pump, a heating member, and a water supply pump. An opening / closing valve connected to the discharge port, a water meter for measuring the amount of water supplied from the discharge port of the water supply pump, and a control member for opening and closing the open / close valve based on the measurement value of the water meter, In the reverse sealing method, a hot water tank is connected to a water inlet of the water supply pump, one end of a pipe is connected to a discharge port, and hot water heated by the heating member is conducted into the pipe,
In the non-digging resin lining method, a water tank is connected to a water supply port of the water supply pump, one end of a pipe is connected to a discharge port, and water is supplied into the pipe, and the control member adjusts a measured value of the water meter. On the basis of this, when the amount of water discharged from the water supply pump reaches a predetermined water amount set in advance, the opening / closing valve is closed to shut off the supply of water into the pipe.

In the water supply device used for the reverse sealing method and the non-digging resin lining method for existing pipes according to the present invention, when the water supply device is used for performing the reverse sealing method, a hot water tank is provided at a water inlet of a water supply pump. One end of a pipe for performing rehabilitation repair is connected to the discharge port. Then, by driving the water supply pump, the hot water heated by the heating member is conducted into the pipe into which the lining tube was inserted in the previous step in the reversal sealing method.

[0010] Due to the conduction of the hot water, the lining tube is pressed against the inner peripheral surface of the pipe by the water pressure of the hot water inside the pipe, and the heat of the hot water causes a gap between the outer surface of the lining tube and the inner surface of the pipe. By curing the interposed adhesive, the lining tube is firmly adhered to the pipe while being in close contact with the pipe. At this time, the control member is turned off, and the open / close valve connected to the discharge port of the water supply pump is kept open.

When this water supply device is used for performing a non-digging resin lining method, a water supply tank is connected to a water intake port of a water supply pump, and an open end of a pipe for performing rehabilitation repair is connected to a discharge port. At this time, a lining pig, a lining resin, a transport pig, and the like are sequentially introduced into the pipe in the previous step in the non-digging resin lining method.

In this state, the control member is turned on, the water supply pump is driven, and the water supplied from the water supply tank is introduced into the pipe. As a result, the lining resin is pushed into the pipe in the depth direction by the water pressure while the lining resin is sandwiched between the lining pig and the transport pig.

The control member determines, based on the measurement value of the flow meter, that the amount of water supplied from the water supply pump has reached a predetermined amount of water required for the head of the lining resin to reach a predetermined position in the pipe. Then, close the open / close valve and shut off the water supply from the water supply pump to the pipe. In this way, the lining resin is pushed down to the head of the section in the pipe where rehabilitation repair is performed.

As described above, according to the above invention, the circulation of warm water in the reversal sealing method and the water supply for pushing the lining resin to a predetermined position in the pipe in the non-digging resin lining method are performed by one water supply device. Since both can be performed, when performing the reverse seal method and the non-digging resin lining method at the same pipe rehabilitation repair site, less equipment must be transported for the implementation of the non-digging resin lining method, Accordingly, labor and repair costs can be reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2, the water supply device 20 includes a water supply pump that circulates hot water and cold water in a reversal sealing method, a heat source device and a heat exchanger that heat hot water, and a three-way valve is provided at a suction port of the circulation pump. The hot water or the cold water in the hot water tank T1 and the cold water tank T2 connected via the heater is circulated in the pipe 1 while the hot water is heated by a heat source device and a heat exchanger.

The water supply device 20 further includes a solenoid valve for opening and closing the discharge port of the water supply pump necessary for performing the non-digging resin lining method, a water meter M for measuring the amount of water supplied from the water supply pump, A control unit that opens and closes the solenoid valve based on the value measured by the meter M.

When the water supply device 20 is installed at a rehabilitation repair site of an existing pipe and used for performing a reversal sealing method, as shown in FIG. 1, one end of a circulation hose H1 is connected to a discharge port of a water supply pump. One end of the circulation hose H2 is connected to the suction port of the heat exchanger via a three-way valve.

The three-way valve is connected to a cold water tank T2 by a hose H6. Further, the hot water tank T1 and the cold water tank T2 are connected to the water suction ports of the water supply pump through three-way valves by hoses H3 and H5, respectively, and the hot water tank T1 is connected to the discharge port of the heat exchanger by a hose H4. Then, when the step of inserting the lining tube 2 into the existing pipe 1 for rehabilitation repair is completed, the other end of the circulation hose H1 connected to the discharge port of the water supply pump is dug to one end in the pipe 1. The other end of the circulation hose H2 inserted into the shaft 21 and connected to one end of the lining tube 2 in the pipe 1, and further connected to the inlet of the water supply pump is dug into the other end of the pipe 1. Pipe 1 inserted into the vertical shaft 22
Is connected to the other end of the inner lining tube 2.

When the above preparations are completed, the three-way valves are respectively positioned at positions where the hot water tank T1 is connected to the water supply pump and the heat exchanger, and then the water supply pump is driven. By driving the water supply pump, the hot water in the hot water tank T1 is sucked into the water supply pump from the hose H3, and then introduced from the outlet through the circulation hose H1 into the lining tube 2 in the pipe 1.

At this time, the control unit is turned off, and the solenoid valve connected to the outlet of the water supply pump is kept open. And the lining tube 2 of the pipe 1
The hot water that has passed through the inside is introduced into the heat exchanger from the other end through the circulation hose H2, heated by heat exchange with the heat source device, and then returned to the hot water tank T1 by the hose H4.

Due to the circulation of the hot water, the lining tube 2 is pressed against the inner peripheral surface of the pipe 1 by the pressure of the hot water inside the pipe 1, and the heat of the hot water causes the outer surface of the lining tube 2 and the By curing the adhesive interposed between the inner surface and the inner surface, the inner lining tube 2 is firmly adhered to the pipe 1 in a state of being in close contact with the pipe 1.

In this manner, hot water is supplied to the pipe 1 for a required time.
After being circulated in the cooling water, the cold water in the cold water tank T2 is introduced from the water supply pump into the circulation path of the circulation hose H1, the pipe 1, the circulation hose H2, and the hose H6 instead of the hot water by switching the three-way valve. Circulate in this circulation path. After the inside of the pipe 1 is cooled to a predetermined temperature by the circulation of the cold water, the circulation hoses H1 and H
2 is removed from both ends of the pipe 1, and the pipe rehabilitation repair process by the reverse sealing method is completed.

When the water supply device 20 is used to carry out the non-digging resin lining method, as shown in FIG. 2, the end of the circulation hose H1 connected to the discharge port of the water supply pump is connected to the lining pig 11, The lining resin A, the transport pig 12, the water-absorbing agent B, and the water-blocking pig 13 are connected to the open end of the pipe 10 in which they are sequentially introduced. At this time, the three-way valve connected to the suction port of the water supply pump is switched to the side that connects the cold water tank T2 connected by the hose H5 to the water supply pump.

In this state, the control unit is turned on, the water supply pump is driven, and water supplied from the cold water tank T2 through the hose H5 is introduced into the pipe 10. Thereby, the lining resin A is sandwiched between the lining pig 11 and the transport pig 12 by the water pressure,
The inside of the pipe 10 is pushed in the direction of the main pipe P. Then, based on the measurement value of the flow meter, the control unit determines that the amount of water supplied from the water supply pump is
When the pre-calculated amount of water required to reach the predetermined position of 0 is reached, the solenoid valve is closed and the supply of water from the water supply pump to the pipe 10 is shut off.

In this manner, the lining resin A is pushed into the pipe 10 up to the head of the section where the rehabilitation repair is performed. Thereafter, a suction pump is connected to the open end of the pipe 10, and the lining resin A is sucked to the open end side of the pipe 10.
A uniform lining film of the lining resin A is formed on the inner surface of the substrate.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention in a case where it is used for performing a reversal sealing method.

FIG. 2 is a diagram showing an embodiment of the present invention in a case where it is used for performing a non-drilling resin lining method.

FIG. 3 is a diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Piping 2 ... Lining tube 10 ... Piping 11 ... Lining pig 12 ... Conveying pig 13 ... Water blocking pig 20 ... Water supply device A ... Lining resin B ... Water absorbing agent T1 ... Hot water tank T2 ... Cold water tank (water supply tank) M ... Water meter MP: Main pipe

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D063 EA07 3H025 EA01 EB23 EB25 EC01 ED02 EE04

Claims (1)

[Claims] 1. A water supply pump, a heating member, an open / close valve connected to a discharge port of the water supply pump, a water meter for measuring the amount of water supplied from the discharge port of the water supply pump, and a measured value of the water meter. A control member that opens and closes the open / close valve based on the method.In a reversal sealing method, a hot water tank is connected to a water intake port of the water supply pump, and one end of a pipe is connected to a discharge port, and heated by the heating member. In the non-drilling resin lining method, a water tank is connected to a water supply port of the water supply pump, one end of the pipe is connected to a discharge port, and water is supplied into the pipe. However, based on the measurement value of the water meter, when the water amount discharged from the water supply pump reaches a predetermined water amount set in advance, closes the open / close valve and shuts off water supply into the pipe. It water supply apparatus used for reversing sealing method and non-excavation resin lining method of the existing pipe and said.